Why is my Xerox font degrading in appearance in Blender?
Fonts are known for topology issues and this one is, too, incontinuous (see below)


Maybe Blender has problems qualifying it as a separate object or a hole or yet something else and hence the incomplete filling.  

One way out of this is to make the logo in an external app and import it as a plane to Blender. Then, just set the camera to ortographic, add proper world color and you're done.

Or, if you want to do some more Blender work, use it as a background image for your model.